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Current-limiting reactor device

A technology of current-limiting reactors and reactors, which is applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., and can solve problems such as the increase in processing energy of surge absorbers

Inactive Publication Date: 2016-03-16
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the inductance of the current-limiting reactor is large, the inductive energy stored in the current-limiting reactor must also be processed by the surge absorber of the DC circuit breaker, and the processing energy of the surge absorber of the DC circuit breaker becomes larger. question

Method used

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no. 1 Embodiment approach

[0021] (structure)

[0022] Such as figure 1 As shown, the current-limiting reactor device 1 according to this embodiment is arranged in a main circuit 100 together with a DC circuit breaker 10 . The DC breaker 10 includes a breaker 11 on a main circuit 100 , and a surge absorber 12 is connected in parallel to the breaker 11 . The current-limiting reactor device 1 includes a current-limiting reactor 2 , a surge absorber 3 , and a switch 4 .

[0023] The current limiting reactor 2 is inserted into the main circuit 100 to which the DC circuit breaker 10 is connected, and is connected in series with the DC circuit breaker 10 . Surge absorber 3 is connected in parallel with current limiting reactor 2 . The switch 4 is connected in parallel with the current limiting reactor 2 and connected in series with the surge absorber 3 .

[0024] The current-limiting reactor 2 is located on the main circuit 100 to which DC power is fed, and suppresses the proportion of the increase of the...

no. 2 Embodiment approach

[0038] A current-limiting reactor device 1 according to the second embodiment is a single-phase transformer 1a. One coil 2 a of the pair of coils 2 a , 5 included in the single-phase transformer 1 a is connected to the main circuit 100 at its both terminals, and also functions as the current-limiting reactor 2 . The switch 4 and the surge absorber 3 are provided in a circuit in which the other coil 5 is arranged, and are connected in series with the other coil 5 .

[0039] In this single-phase transformer 1a, after the fault time point I, at a certain time point II, the DC circuit breaker 10 cuts off the current, and in addition, after the fault time point I and before the fault time point II, the switch 4 is turned on. . Therefore, the energy is shared and processed by the surge absorber 3 of the current-limiting reactor device 1 and the surge absorber 12 of the DC circuit breaker 10 .

[0040]In this single-phase transformer 1a, since the switch 4 and the surge absorber 3 ...

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PUM

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Abstract

Provided is a current-limiting reactor device with which the ratio of the increase in the fault current can be suppressed without increasing the process energy of a surge absorber possessed by a direct current breaker installed in a direct current system. This current-limiting reactor device (1) is equipped with: a reactor (2) connected in series with a direct current breaker; a surge absorber (3) connected in parallel with the reactor (2); and a switch (4) connected in series with the surge absorber (3). The switch (4) is turned on from the point in time at which the power system fault occurs until the point at which the current is interrupted by the direct current breaker (10).

Description

technical field [0001] Embodiments of the present invention relate to a current limiting reactor arrangement connected in series with a DC circuit breaker in a power system. Background technique [0002] DC power transmission by high voltage is attracting attention and being introduced in various fields because the power loss accompanying power transmission is smaller than that of AC power transmission and the line cost is also reduced. In addition, the spread of DC output distributed power sources represented by power sources using natural energy such as sunlight or wind power, micro gas turbines, and fuel cells has also promoted DC power transmission. [0003] In this DC power transmission, it is necessary to develop a system that converts the voltage levels of loads and distributed power sources to the voltage level of the DC power distribution system based on a DC multi-terminal power distribution system capable of directly supplying power to DC loads from the DC output ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
CPCH02H9/021H02H9/02H02M1/32
Inventor 腰塚正纲田芳明佐藤正幸松井祐树
Owner KK TOSHIBA